Tubular gas filter apparatus

ABSTRACT

An improved arrangement for releasably connecting an end of a tubular gas filter bag to an apertured plenum chamber plate member, including a flexible back-up band and a surrounding resilient collar member cooperatively mounted at the end of the bag to resiliently engage the surrounding wall of an aperture in the plate member to hold the bag end in fast position.

o all 11 "1" llmte States Fe 1 11 1 1 1 3,7473% ODell et al. July 24,W73

[ TUBULAR GAS FILTER APPARATUS 2,805,731 9 1957 Kron 55/300 3 l 4 [75]Inventors: Leonard J. ODell; William R. 13232 g tz: HamiltomJrq both0fL0uiSvi11e,K1/- 3,170,777 2/1965 Held 55 490 [731' Assignee: AmericanAir Filter Company, llnc.,

Louisvme, Primary ExaminerBernard Nozick [22] Filed: Aim 16 1971Attorney-Ralph B. Brick and Charles G. Lamb 211 App]. No.: 134,629

[57] ABSTRACT g 55/341 1 5 An improved arrangement for releasablyconnecting an [58] Fie'ld 303 300 end of a tubular gas filter bag to anapertured plenum 55,304 chamber plate member, including a flexibleback-up 2l0/322 285/162 6 band and a surrounding resilient collar membercooperatively mounted at the end of the bag to resiliently engage thesurrounding wall of an aperture in the plate [56] uN-lTE g g zizggsgiiENTs member to hold the bag end in fast position.

2,308,310 I 17/1943 Ruemelin, Jr. et al. 55/341 7 Claims, 3 DrawingFigures Pmminm FIG. 2

INVENTORS LEONARD J. ODELL WILLIAM R. HAMILTON JR.

a. 6. awe

TUBULAR GAS FILTER APPARATUS BACKGROUND OF THE INVENTION The presentinvention relates to gas separation apparatus and more particularly to areleasable connecting arrangement for connecting the end of a filter bagto an apertured plate member.

Various arrangements are known in the art for connecting the ends offilterbags to the apertured plate members of plenums in gas separatingapparatus. For the most part these past arrangements have been complexin design and construction, as well as expensive in manufacture anderection, quite often failing to effect a fast connection.

The present invention provides an economical, straight-forwardarrangement which can be readily manufactured with a minimum of partsand a minimum of steps, and which, at the same time, permits rapid,releasable connection of a filter bag end to the surrounding walls of anapertureof a plate member of a plenum chamber to hold the bag end infast position during gas treating operations.

Various other features of the present invention will become obvious toone skilled in the art upon reading the disclosure set forthhereinafter.

SUMMARY OF THE INVENTION More particularly, the present inventionprovides, in a baghouse arrangement for filtering particulate matterfrom a gaseous stream including at least one tubular filter bag, animproved arrangement for connecting one end of the filter bag to anaperture of a plenum defining plate member comprising: a flexible bandmember, the band member having an outer diameter slightly less than thediameter of the aperture to which the bag end is connected; a soft,expansible compressible resilient collar surroundingly engaging theouter face of the band member, the resilient collar having acrosssectional channel-like figuration to include spaced apart resilientridges having a diameter in expanded stage slightly greater than thediameter of such aperture with a groove therebetween of a breadthsubstantially equal to the thickness of the plate member and of lesserouter diameter than the aperture, the resilient collar cooperating withthe one end of the filter bag to hold the filter bag end in the apertureof the plate mem her with the groove disposed within the aperture of theplate member in faced relation thereto, and the ridges positioned onopposed sides of the plate member.

his to be understood that various changes can be made'in thearrangement, form and construction of the apparatus disclosed hereinwithout departing from the scope or spirit of the present invention.

Referring to the drawing which discloses one advantageous embodiment ofthe the present invention:

FIG. 1 is an elevational view in section of an apparatus in accordancewith the present invention;

FIG. 2 is an enlarged view of a portion of the filter bag of FIG. 1,disclosing one end of the bag in engagement with an apertured platemember, such end incorporating the novel construction of the presentinvention; and,

FIG. 3 is a slightly reduced exploded view of the novel apparatus ofFIG. 2 disclosing the several elements of the invention.

' As shown in FIG. I, a gas cleaning arrangement incorporating thepresent invention includes a housing 2 having a dirty gas inlet 3 and aclean gas outlet 4.

Spaced apart transverse apertured plate members 6 and 7 divide housing 2into a gas treating chamber 8, a reverse flow chamber 9 and an off-takechamber 1 l, the dirty gas inlet 3 communicating with the gas treatingchamber 8 and the clean gas outlet 4 communicating with the off-takechamber 11. A suitable hopper 12 is positioned below off-take chamber11, hopper 12 being provided with control valve 13 at the lower portionthereof. Gas treating chamber 8 is provided with a plurality of filterbags 16, which can be made of any one of several suitable gas imperviousmaterials as is known in the art. Advantageously, a temperatureresisting glass fiber material can be used.

Postioned in reverse flow chamber 9 is a valve controlled reverse flowflushing mechanism 17 which is utilized to induce jets of air in areverse manner to clean the bags of particulate matter collectedthereon. It is to be understood that the arrangement so far describedconstitutes one of several types of bag filter apparatus known in theart in which the apparatus of the present invention can be incorporated.

In accordance with the present invention, in order to attach the ends ofthe tubular filter bag apparatus 16 to the apertured plates 7 and 8, anovel releasable connecting arrangement is utilized.

Referring to FIG. 3 of the drawing, this releasable connectingarrangement is shown to include a flexible band back-up member 19.Back-up band'19 can be made from any one of several suitable flexible,springlike metallic or plastic materials. Band 19 is sized to have anouter diameter slightly less than the diameter of the aperture in whichit is to be disposed in apertured plate member 7. Band member 19 servesas a back-up member for a soft, expansible-compressible resilient collar21 which surroundingly engages the outer face of band member 19. Collar21 advantageously can be formed from a fabric folded upon itself or canbe extruded from a silicone material to provide a crosssectionalchannel-like configuration including spaced apart resilient ridges 23and 24 having a diameter in expanded stage slightly greater than thediameter of the aperture to which the end of the filter bag 16 isfastened. A groove 26 is disposed betweenv the ridges, this groovehaving a breadth substantially equal to the thickness of plate member 7and having a lesser outer diameter than the aperture.

Resilient material 21 can be fastened to backing ring 19 by suitableadhesive coated tape members 28. It is to be noted that inner ring 19 issized in the instant embodiment to slip over bag 16 at the end therof.The bag end is then folded back upon itself and stitched as at 30 and 31to position the back-up ring 19 and resilient collar 21 therebetween.

In assembly of the filter bag end 16 to apertured plate member 7, it isonly necessary to install the end of the bag member in the aperture withthe flexible band 19 and the resilient collar 21 giving sufficiently topermit insertion of the filter bag end. The groove 26 between the ridges23 and 24 engages in collar like fashion gainst the wall of the apertureand the ridges rest on opposite sides of plate member 7. Thus, thefilter bag end can be readily and easily replaceably connected toapertured plate member 7 in a minimum of steps and with a minimum ofeffort.

We claim:

Lin a bag house arrangement for filtering particulate matter from agaseous stream including at least one plenum having an apertured platemember for gas passage therethrough and at least one tubular filter bagwith one of its ends connected to said plate in flow-throughcommunication with said plenum, the improvement comprising: incombination a flexible resilient band member having an outer diameterslightly less than the diameter of said aperture to which said filterbag end is connected; a soft, expansible-compressible resilient collarsurroundingly engaging the outer face of said band member, said bag endbeing positioned in surrounding relationship with said collar, saidresilient collar being being further defined as having a crosssectionalchannel-like configuration to include spaced apart, resilient ridgeshaving a diameter in expanded stage slightly greater than the diameterof said aperture with a groove therebetween of a breadth substantiallyequal to to the thickness of said plate member and of lesser outerdiameter than said aperture, said bag end and said resilient collarbeing biased against the aperture of the plate to hold said filter bagend in flow communication with said aperture with the groove disposedwithin the aperture of said plate member to face the wall thereof andthe ridges positioned on opposed sides thereof.

2. The apparatus of claim 1, said band being of flexible metallic springsteel and said resilient material being a cloth-like fabric folded uponitself to define said cross-sectional channel configuration.

3. The apparatus of claim 1, and, tape members to hold said resilientmaterial to said band.

4. The apparatus of claim 1, said resilient collar comprising feltedcloth-like material folded upon itself to provide the cross-sectionalchanneHike configuration.

5. The apparatus of claim 1, said resilient collar comprising a siliconeextruded in cross-sectional channellike configuration.

6. The apparatus of claim 1, said end of said filter bag being foldedback upon itself to define an annular space containing said band andresilient material.

7. The apparatus of claim 6, wherein said folded back end of said filterbag is stitched to the bag sidewall to further define said annular spacecontaining said band and resilient material.

1. In a bag house arrangement for filtering particulate matter from agaseous stream including at least one plenum having an apertured platemember for gas passage therethrough and at least one tubular filter bagwith one of its ends connected to said plate in flow-throughcommunication with said plenum, the improvement comprising: incombination a flexible resilient band member having an outer diameterslightly less than the diameter of said aperture to which said filterbag end is connected; a soft, expansible-compressible resilient collarsurroundingly engaging the outer face of said band member, said bag endbeing positioned in surrounding relationship with said collar, saidresilient collar being being further defined as having a crosssectionalchannel-like configuration to include spaced apart, resilient ridgeshaving a diameter in expanded stage slightly greater than the diameterof said aperture with a groove therebetween of a breadth substantiallyequal to to the thickness of said plate member and of lesser outerdiameter than said aperture, said bag end and said resilient collarbeing biased against the aperture of the plate to hold said filter bagend in flow communication with said aperture with the groove disposedwithin the aperture of said plate member to face the wall thereof andthe ridges positioned on opposed sides thereof.
 2. The apparatus ofclaim 1, said band being of flexible metallic spring steel and saidresilient material being a cloth-like fabric folded upon itself todefine said cross-sectional channel configuration.
 3. The apparatus ofclaim 1, and, tape members to hold said resilient material to said band.4. The apparatus of claim 1, said resilient collar comprising feltedcloth-like material folded upon itself to provide the cross-sectionalchannel-like configuration.
 5. The apparatus of claim 1, said resilientcollar comprising a silicone extruded in cross-sectional channel-likeconfiguration.
 6. The apparatus of claim 1, said end of said filter bagbeing folded back upon itself to define an annular space containing saidband and resilient material.
 7. The apparatus of claim 6, wherein saidfolded back end of said filter bag is stitched to the bag sidewall tofurther define said annular space containing said band and resilientmaterial.